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diff --git a/fpdfsdk/fpdfxfa/cpdfxfa_document.h b/fpdfsdk/fpdfxfa/cpdfxfa_document.h
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+++ b/fpdfsdk/fpdfxfa/cpdfxfa_document.h
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+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef FPDFSDK_FPDFXFA_CPDFXFA_DOCUMENT_H_
+#define FPDFSDK_FPDFXFA_CPDFXFA_DOCUMENT_H_
+
+#include <memory>
+
+#include "fpdfsdk/fpdfxfa/cpdfxfa_docenvironment.h"
+#include "xfa/fxfa/xfa_ffdoc.h"
+
+class CPDFSDK_Document;
+class CPDFSDK_Environment;
+class CPDFXFA_App;
+class CPDFXFA_Page;
+class CXFA_FFDocHandler;
+class IJS_Runtime;
+class IJS_Context;
+
+enum LoadStatus {
+  FXFA_LOADSTATUS_PRELOAD = 0,
+  FXFA_LOADSTATUS_LOADING,
+  FXFA_LOADSTATUS_LOADED,
+  FXFA_LOADSTATUS_CLOSING,
+  FXFA_LOADSTATUS_CLOSED
+};
+
+class CPDFXFA_Document {
+ public:
+  CPDFXFA_Document(std::unique_ptr<CPDF_Document> pPDFDoc,
+                   CPDFXFA_App* pProvider);
+  ~CPDFXFA_Document();
+
+  FX_BOOL LoadXFADoc();
+  CPDF_Document* GetPDFDoc() { return m_pPDFDoc.get(); }
+  CXFA_FFDoc* GetXFADoc() { return m_pXFADoc.get(); }
+  CXFA_FFDocView* GetXFADocView() { return m_pXFADocView; }
+  int GetDocType() const { return m_iDocType; }
+
+  CPDFSDK_Document* GetSDKDoc() const { return m_pSDKDoc.get(); }
+  void SetSDKDoc(std::unique_ptr<CPDFSDK_Document> pSDKDoc);
+
+  void DeletePage(int page_index);
+  int GetPageCount() const;
+
+  CPDFXFA_Page* GetXFAPage(int page_index);
+  CPDFXFA_Page* GetXFAPage(CXFA_FFPageView* pPage) const;
+
+  void RemovePage(CPDFXFA_Page* page);
+
+  void ClearChangeMark();
+
+ protected:
+  friend class CPDFXFA_DocEnvironment;
+
+  int GetOriginalPageCount() const { return m_nPageCount; }
+  void SetOriginalPageCount(int count) {
+    m_nPageCount = count;
+    m_XFAPageList.SetSize(count);
+  }
+
+  LoadStatus GetLoadStatus() const { return m_nLoadStatus; }
+
+  CFX_ArrayTemplate<CPDFXFA_Page*>* GetXFAPageList() { return &m_XFAPageList; }
+
+ private:
+  void CloseXFADoc(CXFA_FFDocHandler* pDoc) {
+    if (pDoc) {
+      m_pXFADoc->CloseDoc();
+      m_pXFADoc.reset();
+      m_pXFADocView = nullptr;
+    }
+  }
+
+  int m_iDocType;
+
+  std::unique_ptr<CPDF_Document> m_pPDFDoc;
+  // |m_pSDKDoc| must be destroyed before |m_pPDFDoc| since it needs to access
+  // it to kill focused annotations.
+  std::unique_ptr<CPDFSDK_Document> m_pSDKDoc;
+  std::unique_ptr<CXFA_FFDoc> m_pXFADoc;
+  CXFA_FFDocView* m_pXFADocView;  // not owned.
+  CPDFXFA_App* const m_pApp;
+  CFX_ArrayTemplate<CPDFXFA_Page*> m_XFAPageList;
+  LoadStatus m_nLoadStatus;
+  int m_nPageCount;
+
+  // Must be destroy before |m_pSDKDoc|.
+  CPDFXFA_DocEnvironment m_DocEnv;
+};
+
+#endif  // FPDFSDK_FPDFXFA_CPDFXFA_DOCUMENT_H_